A surprising reality: indoor air quality on the North Shore is a real concern
When we talk about air pollution in Québec, most people instinctively think of major urban areas like Montréal. However, several sectors of the North Shore – including Laval, Terrebonne, Blainville and Saint-Eustache – actually show higher levels of indoor air pollution than more densely populated urban centers. This may come as a surprise, but it’s tied to specific factors related to heating, insulation, and especially the lack of an efficient mechanical ventilation system.
At AirGreen, we frequently intervene on the North Shore to solve these invisible yet serious issues. And that’s exactly what we did during a recent HVAC service call in Boisbriand, where we installed a state-of-the-art heat recovery ventilation system (HRV) in a single-family home built in 2005.
Why is indoor air quality more problematic in the suburbs?
Better insulation… but less breathability
Modern homes, like those found in Mascouche, Lorraine or Sainte-Thérèse, are often better insulated than apartment buildings in Montréal. While this reduces heat loss, it also prevents natural air renewal. The result: domestic pollutants (CO2, humidity, mold, fine particles) build up quickly in a sealed environment.
Lack of centralized mechanical ventilation systems
Unlike condos in Montréal, which are often equipped with forced air systems, many homes on the North Shore still rely on passive ventilation—or have no system at all. Without a HRV (Heat Recovery Ventilator) or ERV (Energy Recovery Ventilator), airflow is practically non-existent.
Wood heating and its hidden effects
In many semi-rural neighborhoods on the North Shore (Saint-Colomban, Mirabel, Saint-Lin-Laurentides), wood heating is still common. But the PM2.5 fine particles produced by wood combustion can easily enter homes—especially when ventilation is ineffective.
Case study: HRV installation in Boisbriand by AirGreen
The context
Our clients, a family of five living in a two-story home, reported frequent headaches, condensation on windows, and stagnant odors in the bedrooms. There was no mechanical ventilation system—just a kitchen range hood and a bathroom fan.
AirGreen’s assessment
We conducted a complete indoor air quality analysis using CO2 sensors, hygrometers, and an air exchange test. The results showed CO2 levels consistently above 1400 ppm, humidity over 65%, and airborne mold spores detected.
The solution installed
We proposed and installed a Venmar AVS N Series HRV system (160 CFM) with insulated flexible ducts and a network of strategically placed extraction and distribution vents:
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Extraction: kitchen, bathrooms, laundry room
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Distribution: bedrooms, living room, basement
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Smart control with humidity sensor and wall-mounted programmable unit
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MERV 13 filtration, ideal for families with allergies or asthma
The installation took two days, including discreet ductwork installation in the attic and airflow calibration for optimal performance.
Results achieved
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CO2 levels reduced to an average of 800 ppm
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Humidity stabilized at 45%
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Immediate improvement in comfort, and odors completely eliminated
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Customer testimonial: "We finally feel like we’re breathing fresh outdoor air inside!"
What this service call reveals about the North Shore’s needs
A growing demand for ventilation solutions
From Laval to Saint-Jérôme, we’re seeing a clear increase in requests for mechanical ventilation installations. These come from both new homeowners and families who have lived in their homes for years.
Available grants
The Hydro-Québec LogisVert program offers grants for the installation of energy-efficient HRV systems, as long as the equipment meets certain standards (Energy Star, minimum airflow, thermal efficiency).
Practical advice from AirGreen
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If your home is new and well insulated, install a high-performance HRV before air quality issues become noticeable.
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Avoid common mistakes: poorly positioned vents, uninsulated ducts in attics, or lack of quality filtration.
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Have your indoor air quality tested at least every five years—especially if you have children or respiratory conditions.
Why trust AirGreen with your ventilation needs on the North Shore?
Local, certified HVAC expertise
We’ve been serving Montréal, Laval, Longueuil, the North Shore and South Shore for over 15 years, with certified technicians, top-quality equipment, and personalized after-sales support.
Installations tailored to every home
From Laval condos to remote cottages in Saint-Hippolyte, we tailor every installation to the actual configuration of your home, your specific needs, and your budget.
Complete support
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Free air quality analysis
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Custom estimate
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Assistance with grant applications
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Preventive maintenance service
Conclusion: cleaner air, greater comfort, added home value
Never underestimate the impact of poor air quality on your health and that of your family. On the North Shore, modern homes require well-designed and professionally installed mechanical ventilation systems. At AirGreen, we’re your trusted partner to improve your indoor air quality for good—with proven, customized solutions.